Lucas doesn't create or score, and isn't a very good holding player. All he does is run about the pitch rather slowly, and pass the ball 5 yards. He does run about slowly a lot, though, and makes lots of short passes.
And if he does this without fucking something up, and playing like a cunt (cf Stoke game), then he is described as 'immense' and 'superb' by a variety of hyperbolic cabbages